函数y=log2（x2+1）（x＜0）的反函数是（）._爱下问搜题

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问题填空题

函数y=log₂（x²+1）（x＜0）的反函数是（）.

答案

单项选择题 A1型题

研究社会阶层与健康的意义主要在于（）

A.探讨不同社会阶层人群的死亡谱和疾病谱

B.发现弱势人群

C.掌握公众医疗卫生服务需要量

D.研究不同社会阶层人群的社会适应能力

E.研究不同社会阶层人群的价值观念

补全对话，情景问答

根据所给句子. 选择最佳的应答语。每个选项只能用一次。

(    )1. Do you think it important to exercise?
(    )2. What do you do on Sunday?
(     )3. Is she too young to make her own decisions?
(     )4. Are you going to leave school at the end of the term?
(    )5. What does your brother do in the evening?

A.  Yes, she is.
B.  I guess so.
C.  Watching TV.
D.  Yes, this is my last year at school.
E.  No, this is my last year at school.
F.  He chats on the Internet.